ENTC - Lecture 1 (Quality & Normal Distributions)

Poll

How are you feeling today?

• I'm feeling great 😃

• I'm good 🙂

• I'm doing fine but could be better 😕

• I'm struggling 😔

• I don't know 😐

Open Ended

Tell me your legal given name (First and last name please, so I can make sure I count you present), but also share with me your preferred name (nickname, etc.) that you'd like me to call you by.😊

Open Ended

What questions do you have at this point?😊

​Quality Assurance &

Multiple Choice

In a factory, the weight of the concrete poured into a mold by a machine follows a normal distribution with a mean of 1150 pounds and a standard deviation of 22 pounds. Approximately 99.7% of molds filled by this machine will hold weights in what interval? 

• 1084 to 1216 pounds 

• 1106 to 1150 pounds 

• 1106 to 1194 pounds 

• 1128 to 1172 pounds

Multiple Choice

Which interval shows 95% of the data given a mean of 15 and a standard deviation of 3? 

• 9 to 21

• 12 to 18

• 6 to 24

• 13 to 16

Multiple Choice

What percent of people within 2 standard deviations of the mean?

• 99.7

• 34

• 68

• 95

Multiple Choice

What percent of people within 1 standard deviation of the mean?

• 99.7

• 34

• 68

• 95

Multiple Choice

What percent of people are 3 standard deviations above the mean?

• .15

• 34

• 68

• 2.35

Multiple Choice

2000 freshmen at State Univ. took a Biology test. The scores were distributed normally with μ=70 and σ=5.

What percent of scores are between 65 and 75?

• 34%

• 50%

• 68%

• 81.5%

Multiple Choice

With a data set of: 45, 27, 35, 26, 25, 33, 45, 47
What is the range, mean, median, and mode?

• range = 22

  mean = 35.375

  median = 34

  mode = 45

• range = 8

  mean = 27.5

  median = 32

  mode = 45

• range = 27

  mean = 35.5

  median = 33

  mode = 42

• range = 22

  mean = 35.5

  median = 34

  mode = 45

Multiple Choice

With a data set of: 5, 3, 4, 2, 6
What is the range, mean, median, and mode?

• range = 4

  mean = 4

  median = 4

  mode = none

• range = 5

  mean = 4

  median = 4.5

  mode = none

• range = 4

  mean = 4.5

  median = 4

  mode = 2

• range = 6

  mean = 4.5

  median = 3.5

  mode = 2

Multiple Choice

With a data set of: 1, 1, 2, 3, 5, 7, 9
What is the range, mean, median, and mode?

• range = 8

  mean = 4

  median = 3

  mode = 1

• range =4

  mean = 4

  median = 3

  mode = 1

• range = 9

  mean = 5

  median = 4

  mode = 1

• range = 7

  mean = 4.5

  median = 3

  mode = 1

Multiple Choice

With a data set of: 5, 6, 9, 12, 45, 32, 8, 6, 31, 30, 40, 2, 1, 19
What is the range, mean, median, and mode?

• range = 44

  mean = 17.57

  median = 10.5

  mode = 6

• range = 27

  mean = 17

  median = 10

  mode = 6

• range = 37

  mean = 17.25

  median = 12

  mode = 8

• range = 42

  mean = 17.7

  median = 11

  mode = 7

Multiple Choice

With a data set of: 4, 2, 6, 5, 4, 7
What is the range, mean, median, and mode?

• range = 6

  mean = 4.76

  median = 5.5

  mode = 4

• range = 5

  mean = 4.67

  median = 4.5

  mode = 4

• range = 6

  mean = 4.67

  median = 5

  mode = 4

• range = 5

  mean = 4.67

  median = 5

  mode = 4

​The End